Rotary crusher



(No Model.)

D. BUSHMAN.

ROTARY GRUSHER.

No. 277,543. Patented May 15,1883.

UNITED STATES DAVID BUSHMAN, 0F

PATENT OFFICE.

QUI NGY, CALIFORNIA.

ROTARY CRUSHER.

SPECIFICATION forming part of Letters Patent No. 277,543, dated May 15, 1883,

Application filed December 5, 1882.

T 0 all whom it may concern:

Be it known that I, DAVID BUSHMAN, of Quincy, county of Plumas, State of California, have invented an Improved Rotary Crusher; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a new and useful crusher for breaking and pulverizing rock, ore, quartz, cement, 860.; and it consists in certain details of construction and combination of parts, as hereinafter fully described, and particularly pointed out in the claims.

The object of my invention is to break, crush, and pulverize any substance in the working of which such operation is required; but the particular object I have in view is to crush ore, rock, and quartz for the purpose of extracting the precious metals therefrom.

:teferring to the accompanying drawings,

.Fignre 1 is a perspective view of my improved rotary crusher with cover broken away. 2 is a vertical longitudinal section.

A represents the casing or mortar, having at oneend a hopper, 1- through which ore is fed to the mortar. In the bottom of the mortar, near one end, is a die, D, here shown as set in grooves or recesses in the sides of the mortar, whereby it may readily be removed when worn and another inserted in its place. Mounted transversely inthe mortar is a shaft, 0, having a crank, o, as the means here shown to revolve said shaft. Itigidly secured upon Fig.

theshaft within the sides of the mortar are two flangesor disks, E.

F F are the heaters. These are made with necessary weight, and are each pivoted between the disksE by bolts G, passing through said disks and through the bases of the heaters F. These heaters are r'pivoted at such distances apart that when turned down to lie between the disks the point of one shall just reach and rest upon the base of the other, thus economizing space and preventing blocking or clogging by the heaters. At the rear of the mortar the bottom and end are curved, and

the peripheries of the disks move close to them, and at the other end of said mortar sufficient space is left to allow the heaters to be thrown out horizontally to strike the die D. In the (No model) The disks 1') are/revolved toward the hopper, and each beater, afterit. passes the center of gravity, falls forward and downward away from its placebetween the disks and strikes its blownpon the rock which lies between it and the die I). The continued revolution of the disks then draws the-beater backward over the rock and die, grinding and 'iulverizing the ore it has just broken by its blow. The proximity of the disks to the bottom and rear end of the mortar causes the heater to return to its place between the edges of the disks and there remain until it has passed the center of gravity agaimwhen it delivers another blow. This is the operation of each heater, and the rate of revolution of the disks deterlatter increasing with the speed as the cen trifugal force becomes greater. The blow delivered upon and the. subsequent d *agging of the beater over the rock have a very beneficial effect in thoroughly disintegrating and reducing it to a line pulp, which can be readily worked.

Any of the heaters may be easily removed by withdrawing bolts G, if it should be required; and the die may be replaced, when desired, by removing screen III, which slides in grooves, as shown in Fig. 1, and withdrawing the same endwise.

I am aware that ore-crushing devices in which a rotary wheel provided with fixed beater-arms is,operated in a shell or casing have been heretofore known. I do not, therefore, claim, broadly, such a device; but WVhat I doclaim as new, and desire to secure by Letterslatent, is-

l. The casing or mortar A having a curved rear end, and the removable dieDin the bottom at its forward end, in combination with the disks or flanges E, a shaft therefor, the swinging heaters F F, pivoted'through their bases between said disks or. flanges, the point of one resting upon the base of another when mov One is fed to the mortar through hopper B.-

mines the rapidity and force of the blows, the

ing into operation, and means for revolving or flanges, the point of one resting upon the 10 said disks, substantially as and for the purbase of another when moving into operation,

pose described. substantially as herein shown and described. 2. A crusher consisting of the mortar A, i In witness whereoflhereunto set my hand.

- able die D in the bottom and at its forward having a curved rear end, cover I, and reinov- DAVID BUSHMAN end, hopper B, screens 11, shaft (J, disks or WVitnesses: flanges E, and the swinging heaters F F, piv- G. G. CLOUGH, oted through their bases between said disks H. P. WVORMLEY. 

